Multiple SQL injection vulnerabilities in the getip function in wp-limit-login-attempts.php in the WP Limit Login Attempts plugin before 2.0.1 for WordPress allow remote attackers to execute arbitrary SQL commands via the (1) X-Forwarded-For or (2) Client-IP HTTP header.
https://wpvulndb.com/vulnerabilities/8178
https://plugins.trac.wordpress.org/changeset/1239492/wp-limit-login-attempts